CN217041932U - Exhaust treatment device for oil depot - Google Patents
Exhaust treatment device for oil depot Download PDFInfo
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- CN217041932U CN217041932U CN202220762149.3U CN202220762149U CN217041932U CN 217041932 U CN217041932 U CN 217041932U CN 202220762149 U CN202220762149 U CN 202220762149U CN 217041932 U CN217041932 U CN 217041932U
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- liquid separation
- heat exchanger
- separation tank
- catalytic oxidation
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Abstract
The utility model discloses a waste gas treatment device for oil depot belongs to oily waste gas technical field, including booster compressor, branch liquid jar A, condensation heat exchanger, branch liquid jar B, heater and the catalytic oxidation reactor that connects gradually, the utility model discloses a low temperature condensation method can fully retrieve valuable light hydrocarbon material as the one-level purification, avoids the wasting of resources, simultaneously, adopts the catalytic oxidation method as the second grade purification, can remove the light hydrocarbon in the exhaust gas to the greatest extent, reaches the direct outer row of emission standard.
Description
Technical Field
The utility model relates to an oiliness exhaust-gas treatment technical field specifically is an exhaust treatment device for oil depot.
Background
The oil depot is a storage place of oil products, the oil products stored in the oil depot are various, such as common liquefied gas, light naphtha, gasoline, aviation kerosene, diesel oil and the like, the oil products can be volatilized to generate gas in a storage process, the gas in an oil tank can be discharged outwards when the oil product is filled into the oil tank, and the gas contains oil and is called as oil-containing waste gas.
At present, for a large refinery, the oil-containing waste gas can depend on a light hydrocarbon recovery unit of the refinery to recover hydrocarbon substances. However, for most of the independently installed oil depots, a waste gas treatment device needs to be separately installed, and the currently common treatment devices are divided into two types, one is a recovery device, such as a low-temperature condensation method, a membrane separation method and an adsorption method, and the other is a decomposition device, such as a torch combustion and catalytic decomposition. These methods have merits, such as the problem of the low temperature condensation method that light hydrocarbon cannot be completely removed and the problem of the decomposition method that light hydrocarbon is wasted.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art not enough, the utility model is to provide an exhaust treatment device for oil depot, this device uses low-temperature condensation method and catalytic oxidation method together, adopts the low-temperature condensation method to retrieve light hydrocarbon as far as possible, adopts the catalytic oxidation method to remove the light hydrocarbon in the exhaust gas to the greatest extent, can satisfy emission standard completely.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a waste gas treatment device for an oil depot comprises a supercharger, a liquid separating tank A, a condensing heat exchanger, a liquid separating tank B, a heater and a catalytic oxidation reactor which are connected in sequence; the supercharger is used for supercharging the oil-containing gas in the oil depot, and the specific type of the supercharger can be selected according to the required gas treatment capacity and the pressure grade of subsequent processing, for example, a small centrifugal compressor, a reciprocating compressor and an induced draft fan are adopted, but the supercharger is required to adopt an explosion-proof design; after pressurization, gas pressure is increased to generate condensate, and the condensate tank A is used for separating condensate oil; the condensation heat exchanger is used for reducing the temperature of the oil-containing gas from the liquid separation tank A, and condensate is generated after the temperature is reduced; the liquid separating tank B is used for gas-liquid separation, the separated liquid is oil-containing liquid, the gas is heated by a heater and then sent into a catalytic oxidation reactor, the oil-containing gas is treated by the catalytic oxidation reactor to be changed into carbon dioxide, and water is directly discharged outwards.
The waste gas flow of oil depot is unstable, and the waste gas volume can increase for example during oil tank oil filling, as the utility model discloses a specific implementation mode, divide fluid reservoir A with be provided with the control valve between the condensation heat exchanger, control gets into the gas flow of condensation heat exchanger, the steady oily waste gas's handling capacity, at this moment, the branch fluid reservoir A that sets up has the function of buffer tank concurrently.
As a specific embodiment of the utility model, for the energy saving, divide fluid reservoir a with be provided with heat exchanger a between the condensation heat exchanger, be used for divide the oily gas of fluid reservoir B top export with the oily gas heat transfer of condensation heat exchanger entry can retrieve cold volume like this.
As a specific embodiment of the utility model, for the energy saving, divide fluid reservoir B with be provided with heat exchanger B between the catalytic oxidation reactor, be used for catalytic oxidation reactor export gas and catalytic oxidation reactor entry gas heat transfer can retrieve the heat like this.
Further, the heat exchanger B is positioned between the liquid separation tank B and the heater, the heat load of the heater is relatively easy to adjust, and the temperature fluctuation can be reduced by controlling the inlet temperature of the catalytic oxidation reactor through the heater.
Further, the heater is an electric heater.
Further, a hydrocarbon content analyzer is arranged on a gas phase outlet pipeline of the liquid separation tank B, and the load of the condensing heat exchanger can be adjusted according to the hydrocarbon content in the gas phase.
Has the beneficial effects that: the utility model discloses a low temperature condensation method purifies as the one-level, can fully retrieve valuable light hydrocarbon material, avoids the wasting of resources, simultaneously, adopts catalytic oxidation method as the second grade to purify, can remove the light hydrocarbon in the exhaust gas to the greatest extent, reaches the direct outer row of emission standard.
Drawings
FIG. 1 is a flowchart of an exhaust gas treatment apparatus for an oil depot according to embodiment 1;
FIG. 2 is a flowchart of an exhaust gas treatment apparatus for an oil depot according to embodiment 2;
in the figure: the system comprises a supercharger 1, a liquid separation tank A2, a control valve 3, a condensation heat exchanger 4, a liquid separation tank B5, a heater 6, a catalytic oxidation reactor 7, a temperature sensor 8, a hydrocarbon content analyzer 9, a heat exchanger A10 and a heat exchanger B11.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, the exhaust gas treatment device for the oil depot comprises a supercharger 1, a liquid separation tank a2, a control valve 3, a condensation heat exchanger 4, a liquid separation tank B5, a heater 6 and a catalytic oxidation reactor 7 which are connected in sequence. The supercharger 1 is used for supercharging an oil-containing gas in an oil depot, and since a processing raw material contains a combustible gas, the supercharger 1 is designed to be explosion-proof. Since the flow of the oil-containing waste gas in the oil depot is not stable, for example, the waste gas amount will increase when the oil tank is filled with oil, the liquid separation tank a2 is mainly used for receiving and storing the oil-containing gas from the supercharger 1, and in addition, the gas pressure after supercharging will increase to generate condensate, so the liquid separation tank a2 also has the function of separating condensate. The control valve 3 is used for controlling the flow of the oil-containing gas entering the condensing heat exchanger 4, namely the processing load of the device, for the smooth operation of the device, the flow of the processed oil-containing gas is as stable as possible, and the flow of the processed oil-containing gas can be gradually adjusted according to the incoming gas of an oil depot to avoid large fluctuation. The condensing heat exchanger 4 adopts a low-temperature medium (such as liquid ammonia) as a refrigerant medium to cool the oily gas in the split tank a, and a low-temperature medium circulating part is not shown here, which belongs to the prior art and can be specifically set by adopting a propylene compressor for refrigeration, an ammonia compressor for refrigeration and the like. The liquid separation tank B5 is used for gas-liquid separation, and the separated liquid is the oil-containing liquid and returns. The catalytic oxidation reactor 7 is filled with a catalytic oxidation catalyst, the gas phase of the liquid separation tank B5 is heated by a heater 6 to 150-600 ℃ (the specific reaction temperature range is controlled according to the requirements of catalyst manufacturers), and then the gas phase is sent into the catalytic oxidation reactor 6 to be subjected to oxidation reaction to generate carbon dioxide and water, and the products meet the emission standard and are directly discharged to a high point (the height of the products is 15m or more from the ground).
In addition, a pressure sensor is arranged on a gas phase pipeline at the top of the liquid separation tank A2 and used for measuring the pressure of the liquid separation tank A2 of the liquid separation tank, the pressure is used as a basis for adjusting the oil-gas content of the condensation heat exchanger 4, a flow sensor is arranged on a pipeline from the control valve 3 to the condensation heat exchanger 4, and the gas flow of the condensation heat exchanger 4 is gradually increased when the pressure is high.
The gas phase outlet pipeline of the liquid separation tank B5 is provided with a hydrocarbon content analyzer 9 which can adjust the load of the condensing heat exchanger 4 according to the hydrocarbon content in the gas phase, and when the hydrocarbon content is high, the load of the condensing heat exchanger 4 can be properly increased and the temperature can be reduced.
A temperature sensor 8 is arranged on a pipeline between the heater 6 and the catalytic oxidation reactor 7 and used for measuring the inlet temperature of the catalytic oxidation reactor 7 and providing a basis for adjusting the heat load of the heater 6.
Liquid phases at the bottoms of the liquid separation tank A2 and the liquid separation tank B5 are oil-containing liquids, and are respectively controlled by a liquid level control valve and then are sent out to a dirty oil collection facility.
Example 2
In this embodiment, for the purpose of energy saving, a new exhaust gas treatment device for an oil depot formed by improving embodiment 1 mainly has the following improvements:
1. a heat exchanger A10 is arranged between the control valve 3 and the condensing heat exchanger 4, and is used for heat exchange between the oily gas (low temperature) at the top outlet of the liquid separation tank B5 and the oily gas (high temperature) at the inlet of the condensing heat exchanger 5, so that the cold energy can be recovered.
2. A heat exchanger B11 is arranged between the liquid separation tank B5 and the heater 6 and is used for exchanging heat between the gas at the outlet of the catalytic oxidation reactor 6 and the gas at the inlet of the catalytic oxidation reactor 6, so that heat can be recovered. Specifically, the heat exchanger B11 is located between the heat exchanger a10 and the heater 6, the heater 6 is an electric heater, the inlet temperature of the catalytic oxidation reactor is controlled by the heater 6 during actual operation, and temperature fluctuation can be reduced by controlling the temperature by the heater 6 compared with the temperature control of a heat pump heat exchange system.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The waste gas treatment device for the oil depot is characterized by comprising a supercharger, a liquid separation tank A, a condensation heat exchanger, a liquid separation tank B, a heater and a catalytic oxidation reactor which are sequentially connected; the booster compressor is used for boosting the oil-containing gas from the oil depot, the liquid separation tank A and the liquid separation tank B are used for gas-liquid separation, the condensing heat exchanger is used for reducing the temperature of the oil-containing gas from the liquid separation tank A, the heater is used for controlling the temperature of the oil-containing gas entering the catalytic oxidation reactor, and the catalytic oxidation reactor is filled with a catalyst for oxidizing hydrocarbon substances into carbon dioxide and water.
2. The exhaust gas treatment device for the oil depot according to claim 1, wherein a control valve is arranged between the liquid separation tank A and the condensing heat exchanger for controlling the flow of the oil-containing gas entering the condensing heat exchanger.
3. The exhaust gas treatment device for the oil depot according to claim 1, wherein a heat exchanger B is arranged between the liquid separation tank B and the catalytic oxidation reactor, and is used for exchanging heat between the outlet gas of the catalytic oxidation reactor and the inlet gas of the catalytic oxidation reactor.
4. The exhaust gas treatment device for the oil depot according to claim 3, wherein the heat exchanger B is located between the liquid separation tank B and the heater.
5. The exhaust gas treatment device for the oil depot according to any one of claims 1 to 4, wherein a hydrocarbon content analyzer is provided in a gas phase outlet line of the liquid separation tank B.
6. The exhaust gas treatment device for the oil depot according to any one of claims 1 to 4, wherein the heater is an electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220762149.3U CN217041932U (en) | 2022-04-02 | 2022-04-02 | Exhaust treatment device for oil depot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220762149.3U CN217041932U (en) | 2022-04-02 | 2022-04-02 | Exhaust treatment device for oil depot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217041932U true CN217041932U (en) | 2022-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220762149.3U Active CN217041932U (en) | 2022-04-02 | 2022-04-02 | Exhaust treatment device for oil depot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217041932U (en) |
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2022
- 2022-04-02 CN CN202220762149.3U patent/CN217041932U/en active Active
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